var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");

var indexRouter = require("./routes/web/index");
var authRouter = require("./routes/web/auth");
// 导入account接口路由文件
var accountRouter = require("./routes/api/account");
// 导入auth接口路由文件
var authApiRouter = require("./routes/api/auth");

// 导入express-session
const session = require("express-session");
const MongoStore = require("connect-mongo");

const { DBHOST, DBPORT, DBNAME, secret } = require("./config/config");

var app = express();
//3. 设置 session 的中间件
app.use(
  session({
    name: "sid", //设置cookie的name，默认值是：connect.sid
    secret: secret, //参与加密的字符串（又称签名）
    saveUninitialized: false, //是否为每次请求都设置一个cookie用来存储session的id
    resave: true, //是否在每次请求时重新保存session
    store: MongoStore.create({
      mongoUrl: `mongodb://${DBHOST}:${DBPORT}/${DBNAME}`, //数据库的连接配置
    }),
    cookie: {
      httpOnly: true, // 开启后前端无法通过 JS 操作
      maxAge: 1000 * 60 * 60 * 24 * 7, // 这一条 是控制 sessionID 的过期时间的！！！
    },
  })
);

// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");

app.use(logger("dev"));

// Express中请求的req.body可以获取请求参数，
// 这个属性的出现是由于使用了app.use(express.json())（json参数）
// 或app.use(express.urlencoded({extended: false}))（queryString参数）
// 这两个中间件。
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));

app.use("/", indexRouter);
app.use("/", authRouter);
app.use("/api", accountRouter);
app.use("/api", authApiRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  res.render('404')
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render("error");
});

module.exports = app;
